Texas Instruments TPS54202HDDCT

Overview

TPS54202HDDCT from Texas Instruments is a 4.5-V to 28-V input, 2-A synchronous step-down DC/DC converter in SOT-23-6 package, integrating 148-mΩ high-side and 78-mΩ low-side MOSFETs, operating at fixed 500-kHz switching frequency with internal 5-ms soft start and Eco-mode™ pulse skip for light-load efficiency. It delivers regulated 5-V or 3.3-V outputs in distributed power-bus supplies for STB/DTV and printer applications.

For engineers reviewing the TPS54202HDDCT datasheet, TPS54202HDDCT pinout, TPS54202HDDCT application, or TPS54202HDDCT equivalent, key selection criteria include input voltage range (4.5–28 V), continuous 2-A output capability, thermal shutdown (155°C), overvoltage protection (108% × V_REF), and quiescent current (45 µA non-switching, 2 µA shutdown).

Technical Context

The TPS54202HDDCT employs peak current-mode control with internal slope compensation to prevent subharmonic oscillation across full duty-cycle range, and integrates boot recharge diode and internal loop compensation to eliminate external compensation components. Its constant-frequency PWM architecture enables predictable EMI filtering and stable transient response under line/load changes.

It implements dual overcurrent protection: cycle-by-cycle high-side current limit (typ. 3.2 A) and low-side valley-current limit (typ. 3.0 A), both triggering hiccup-mode recovery (512-cycle wait, 16384-cycle restart) during sustained overload. Output voltage regulation uses a precision 0.596-V reference with ±2.5% tolerance over –40°C to +125°C junction temperature.

Key Specifications

Pinout & Package

SOT-23-6 (DDC) package, 1.60 mm × 2.90 mm body size, thermally enhanced pad-less footprint optimized for low-cost, space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with TPS54202DDCT, the TPS54202HDDCT adds guaranteed thermal shutdown hysteresis and extended junction temperature rating, making it suitable for harsher environments; versus MP2307DN-LF-Z, it delivers superior integration, lower conduction loss, and built-in protection features - reducing design risk and validation effort.

Availability

TPS54202HDDCT is available at Aetrix Electronics and suitable for STB/DTV power supplies, printer mainboards, white goods control modules, and audio amplifier bias supplies requiring stable component supply and long-term production continuity.

Supply support for TPS54202HDDCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability DC/DC conversion.

The TPS54202HDDCT belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for space-constrained, cost-sensitive industrial and consumer applications needing high power density, low quiescent current, and robust protection without external components.

FAQ

What is the maximum continuous output current of the TPS54202HDDCT?

The TPS54202HDDCT delivers 2 A continuous output current under recommended operating conditions (T_J ≤ 125°C, proper PCB thermal design). This rating assumes adequate copper pour and airflow; derating applies above 85°C ambient. The device sustains this current using its integrated 148-mΩ high-side and 78-mΩ low-side MOSFETs without external FETs or drivers - confirmed in TI's SLVSDG7A datasheet Section 6.5.

Does the TPS54202HDDCT support adjustable output voltage?

Yes, the TPS54202HDDCT supports adjustable output voltage via an external resistor divider on the FB pin. With a precise 0.596-V internal reference, output voltages such as 3.3 V, 5 V, or custom values can be set using 1% tolerance resistors. Equation 7 in the datasheet (V_OUT ≈ V_REF × (1 + R2/R3)) defines the relationship - for example, R2 = 100 kΩ and R3 = 13.3 kΩ yields 5 V. The TPS54202HDDCT does not require external compensation components due to internal loop compensation.

How does the TPS54202HDDCT handle startup into a pre-biased output?

During startup into a pre-biased output, the TPS54202HDDCT prevents reverse current flow by disabling both high-side and low-side MOSFETs until the internal soft-start voltage exceeds the FB pin voltage. This safe-startup behavior avoids discharging the output capacitor through the low-side FET - a critical feature for systems with multiple power rails or hot-swap requirements. This function is implemented in hardware and requires no external circuitry, as detailed in Section 7.3.7 of the TPS54202HDDCT datasheet.

What protection features are integrated into the TPS54202HDDCT?

The TPS54202HDDCT integrates overcurrent protection (high-side cycle-by-cycle and low-side valley-current limiting), overvoltage protection (108% × V_REF trip, 104% × V_REF reset), thermal shutdown (155°C activation with 10°C hysteresis), and input UVLO (4.2-V rising threshold). All protections trigger hiccup-mode recovery under sustained faults - verified in Sections 6.5 and 7.3.12–7.3.14 of the official datasheet. No external components are needed to enable these functions.

Can the TPS54202HDDCT operate with input voltage below 4.5 V?

No, the TPS54202HDDCT has a minimum recommended input voltage of 4.5 V per Section 6.3 of the datasheet. Below this, the device may not initiate or sustain regulation due to VIN UVLO (rising threshold 4.2 V typical). Attempting operation at 4.0 V or lower risks erratic switching, dropout, or failure to start - especially under load. For sub-4.5-V applications, consider TI's TPS62864 or similar low-input buck converters instead of the TPS54202HDDCT.